28613645393 has 4 divisors (see below), whose sum is σ = 28653442560. Its totient is φ = 28573848228.

The previous prime is 28613645377. The next prime is 28613645399. The reversal of 28613645393 is 39354631682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39354631682 = 2 ⋅19677315841.

It is a cyclic number.

It is not a de Polignac number, because 28613645393 - 2⁴ = 28613645377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28613645399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19897505 + ... + 19898942.

It is an arithmetic number, because the mean of its divisors is an integer number (7163360640).

Almost surely, 2^28613645393 is an apocalyptic number.

It is an amenable number.

28613645393 is a deficient number, since it is larger than the sum of its proper divisors (39797167).

28613645393 is an equidigital number, since it uses as much as digits as its factorization.

28613645393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39797166.

The product of its digits is 2799360, while the sum is 50.

The spelling of 28613645393 in words is "twenty-eight billion, six hundred thirteen million, six hundred forty-five thousand, three hundred ninety-three".